Definition: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
Input: Question: 10 is subtracted from 50% of a number, the result is 25. Find the number?

 Option A: 75

 Option B: 70

 Option C: 35

 Option D: 170

 Option E: 50

Option B